/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 东莞呵呵
 * Date:2022-03-30
 * Time:17:34
 */
public class Demo {
    public static void main(String[] args) {
        Rectangle rectangle=new Rectangle();
        rectangle.setLength(5);
        rectangle.setWidth(2);
        rectangle.getArea();
        rectangle.getPer();
        rectangle.showAll();


    }
}
